SiUS371614EService Diagnosis 156Part 6Service Diagnosis1. Symptom-based Troubleshooting ........................................................... 1591.1 Indoor Unit Overall ................................................................................... 1591.2 With Optional Infrared Presence/Floor Sensor......................................... 1622. Service Check Function .......................................................................... 1632.1 Wired Remote Controller.......................................................................... 1632.2 Wireless Remote Controller ..................................................................... 1652.3 Error Codes and Descriptions .................................................................. 1672.4 Error Codes - Sub Codes ......................................................................... 1693. Troubleshooting by Error Code ............................................................... 1703.1 External Protection Device Abnormality ................................................... 1703.2 Indoor Unit PCB Abnormality ................................................................... 1723.3 Drain Level Control System Abnormality.................................................. 1733.4 Fan Motor Lock, Overload........................................................................ 1753.5 Indoor Fan Motor Abnormality.................................................................. 1783.6 Overload/Overcurrent/Lock of Indoor Fan Motor...................................... 1823.7 Blower Motor Not Running ....................................................................... 1833.8 Indoor Fan Motor Status Abnormality....................................................... 1843.9 Low Indoor Airflow.................................................................................... 1853.10 Swing Flap Motor Abnormality ................................................................. 1863.11 Power Supply Voltage Abnormality .......................................................... 1883.12 Blower Motor Stops for Over/Under Voltage ............................................ 1893.13 Electronic Expansion Valve Coil Abnormality, Dust Clogging .................. 1903.14 Drain Level above Limit............................................................................ 1913.15 Capacity Determination Device Abnormality ............................................ 1923.16 Transmission Abnormality between Indoor Unit PCB and Fan PCB ........ 1933.17 Blower Motor Communication Error ......................................................... 1953.18 Thermistor Abnormality ............................................................................ 1963.19 Combination Error between Indoor Unit PCB and Fan PCB .................... 1973.20 Blower Motor HP Mismatch...................................................................... 1983.21 Indoor Blower Does Not Have Required Parameters to Function ............ 1993.22 Remote Sensor Abnormality .................................................................... 2003.23 Humidity Sensor System Abnormality ...................................................... 2013.24 Infrared Presence/Floor Sensor Error ...................................................... 2023.25 Remote Controller Thermistor Abnormality .............................................. 2073.26 Outdoor Unit Main PCB Abnormality........................................................ 2083.27 Actuation of High Pressure Switch ........................................................... 2093.28 Actuation of Low Pressure Sensor ........................................................... 2113.29 Inverter Compressor Motor Lock.............................................................. 2123.30 Compressor Damage Alarm..................................................................... 2143.31 Outdoor Fan Motor Abnormality ............................................................... 2163.32 Electronic Expansion Valve Coil Abnormality........................................... 218
